Comparison Between Single-Step and Two-Step Chemistry in a Compression Ignition Free Piston Engine Technical Research Center of Finland, VTT Energy

Format:

Conference/Event

Author/Creator:

Kaario, Ossi, author.

Conference Name:

International Fuels and Lubricants Meeting and Exposition (2000-10-16 : Baltimore, Maryland, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2000

Summary:

The focus of this paper is to compare results from 3D combustion simulations when using either a single-step or a two-step description of the chemistry of combustion in a two stroke free piston diesel engine.To reduce the computational cost, only one sector of the whole cylinder is computed, id est one fuel spray. The simulation starts after the exhaust ports are closed and ends before the exhaust ports opening. The fuel injection is described by a Lagrangian method where the break up and interaction of the droplets are taken into account as well as droplet wall interaction and evaporation. Turbulence is modeled using the standard high Reynolds number k-ε model. The combustion of fuel vapor is modeled by the the Eddy Dissipation Combustion Model (EDCM). In the case of two-step chemistry, the combustion of CO is taken into account. The kinetic rate of CO combustion is determined from a global expression

Notes:

Vendor supplied data

Publisher Number:

2000-01-2937

Access Restriction:

Restricted for use by site license